Group 2

Group 2 elements also known as _____.

• Alkaline metals

• Alkaline earth metal

• Earth metals

• Metals

Which of the following is not Group 2 element?

• Beryllium

• Boron

• Strontium

• Barium

Which of the following statements is true regarding the properties of Group 2 elements?

• They are silvery white solid.

• They are kept in the paraffin oil.

• They are oxidising agents

• They are radioactive.

Which of the following is not true of Group 2 elements when descending the group?

• The atomic radius increases.

• The electronegativity decreases.

• The melting point increases.

• First ionisation decreases.

The standard electrode potential, E∘, of M²⁺/M for Group 2 elements becomes more negative when descending the group.

This shows that ________

• the reactivity decreases.

• the reducing strength increases.

• the metallic character increases.

• the basic properties increases.

Choose the correct valence electronic configuration for Group 2 elements.

• ns¹

• ns²

• ns² np¹

• ns² np²

Metal M burns in air with brick red flame.

Metal M does not react with cold water, but reacts rapidly with steam.

Oxide of metal M is slightly soluble in water.

Metal M is ____

• Beryllium

• Magnesium

• Calcium

• Strontium

The carbonates of Group 2 elements decompose on heating.

Which of the following does not explain the statement above?

• Lattice energy of MO is more exothemic than that of MCO₃

• Electron cloud of oxide is smaller than that of carbonate

• Ionic bond in MO is stronger than MCO₃

• Polarising power of cation increases

Which of the following explain why the thermal stability of MCO₃ increases down the group?

• The polarising power of cations decrease.

• The electron cloud is distorted more easily.

• The lattice energy of MCO₃ increases.

• The charge density of cations increase.

Which of the cation has the highest polarisng power?

• Ca²⁺

• Mg²⁺

• Ba²⁺

• Al³⁺